Buffer booster: installed in the end of the guide rail, the realization of doors in place at the time of the buffer and recovering the booster function.
The door in the door (door) : refers to the large industrial doors, for the convenience of staff to traffic in the gate to open the door to door leaf.
Light inlet window: in order to enhance the indoor light and transparent window on the doors to open.
Flat wheel: refers to the shape of the column type, suitable for normal installation and low installation with wire wheel.
Cone: refers to the shape like a tower type, suitable for vertical lift door industry with wire rope wheel.
Half cone: refers to the part shape for column type, part of the tower type, suitable for high lift door with wire rope wheel industry.